試題詳解

2. Which of the following statements about ligands, d-block metals, and coordination complexes is correct?
(A) The cyanate ion (OCN' can have three different Lewis structures, in which all the N atoms have the same formal charge.
(B) Zinc is a component of vitamin, which is essential for the metabolism of carbohydrates, fats, and proteins.
(C) [Co(NH₃)₄Cl₂]⁺ has cis-trans isomers, and the cis isomer is optically active.
(D) [Cr(en)(NH₃)₂l₂]⁺(en = ethylenediamine) has three geometrical isomers.
(E) The octahedral complexes are more appropriate than the octahedral complexes to be used to determine the field strength of a ligand.